Cellular phone and method of operating the same
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United States of America Patent
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Sep 11, 2007
Grant Date -
Nov 20, 2003
app pub date -
May 13, 2003
filing date -
May 14, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A cellular phone covering a plurality of frequency bands, includes (a) an antenna, (b) a high-frequency circuit, (c) an antenna-matching circuit electrically connecting in series between the antenna and the high-frequency circuit, and (d) a first unit which varies a ground length in accordance with a frequency band in which the cellular phone makes communication with others, the ground length being defined as a length of a ground area for the antenna-matching circuit.
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